To do a David; when you're undertaking any boring or monontanous task. Derived from the name David - that guy who drives an orange Renault Megane but calls it African Sunset.
What you get up to this weekend? Oh, just doing a David. What's that? You know, To Do a David; planting the frontgarden border, insulating the loft, washing the Megane.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.